JBL CSMA 2120 Commercial Series Mixer/Amplifier

The JBL CSMA2120 is a mixer amplifier built for everyday commercial sound systems. It delivers up to 120 watts of output across two channels and can run either 70 volt or 100 volt distributed lines as well as standard 4 or 8 ohm speakers, so you can match whatever wiring and loudspeakers are already in place without adding extra hardware.

Eight input channels accept microphones, music players, and other sources through Euroblock, RCA, and 1/4-inch connectors. Each channel has its own illuminated volume knob on the front panel, making level adjustments quick even when the lights are low. Separate bass and treble controls let staff shape the overall tone without diving into menus.

For venues that need clear announcements, the unit offers voice-activated ducking that automatically lowers background music when someone speaks on a paging mic. Channels 1 and 5 also carry priority muting, so critical messages cut through every time. Remote volume ports on the rear panel allow wall-mounted controllers to manage levels from convenient spots around the building.

Energy savings come from a built-in sleep mode that powers the amplifier down after 30 minutes of silence, then wakes it up the instant audio returns. A compact 1U form factor slides easily into a rack and leaves room for other gear. These details make the CSMA2120 a dependable choice for cafés, retail floors, conference rooms, or any space that needs steady, straightforward sound.

Highlights:

• Eight input channels and two output channels handle multiple sources and zones
• 120 W total power with 15 W available on each output channel
• Drives 70 V, 100 V, 4 ohm, or 8 ohm speaker systems without an external transformer
• Front panel knobs for individual channel volume plus overall bass and treble
• Illuminated controls remain visible in low-light environments
• Voice-activated ducking automatically lowers music during announcements
• Priority muting on channels 1 and 5 ensures important messages are heard
• Euroblock and RCA inputs provide flexible connection options
• RJ45 ports support remote volume control from wall plates or keypads
• Automatic sleep mode conserves energy after 30 minutes of inactivity
• Rack-mountable 1U chassis simplifies installation in commercial racks
• Energy-efficient design helps facilities meet operational and environmental goals